The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 20, 1983
Filed:
Sep. 29, 1981
Applicant:
Inventors:
Murray D Nelsen, Goddard, KS (US);
Robert K Kunze, Jr, Wichita, KS (US);
Robert F Olsen, Woodinville, WA (US);
Ira B Rushwald, Seattle, WA (US);
Assignee:
The Boeing Company, Seattle, WA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B64D / ;
U.S. Cl.
CPC ...
181214 ; 181286 ; 181292 ; 428116 ;
Abstract
A high efficiency broadband acoustic resonator and absorption panel used for reducing engine noise from high bypass fan jet engines mounted on an aircraft. The panel uses a single layer of cellular honeycomb core with a pair of parallel acoustic septums formed internally in the core for attenuating high and medium frequency sounds during all engine operations as well as the low frequency combination tone and 'buzzsaw' noise experienced during high power aircraft takeoff and cutback engine power settings.